Photographic print and method of making the same



Patented Feb. 16, 1926.

UNITED STATES PATENT OFFICE.

oHAnLnsw. CARMAN, or CHICAGO, ILLINOIS.

1T0 Drawing.

' To all whom it may concern:

Methods of Making the Same, of which the following is a specification.

r This invention relates to phooograp .c prints and the method of makingthe same, and is fully described 111 the following specification.

. March 21, 1925.

The process consists in taking a plate of silver, flattening it,eliminating all scratches or depressions by rubbing with fine emerycloth, after which the face of the sheet is given a series of parallelscratches, preferably in a vertical direction, by rubbing it with emerycloth. The sheet is then cleaned in a solution of caustic soda afterwhich it is washed and ready to receive the print. In the case ofsilver, oxidation takes place so readily that the print should beapplied thereon as soon as possible after the prepared plate is cleanedand washed.

While there are various ways in which the print may be applied to theprepared silver surface, I prefer to make this print upon a photographictransfer paper which consists of paper having a coating of gelatin orthe like carrying a light-sensitive pigment. An

f exposure is then made on this sensitized paper, preferably by contactwith a continuous tone negative in a well known man- "then removed fromthe water and squeegeed into contact with the metal plate. It is thendried from 10 to 20 minutes to cause it to adhere more firmly to themetal surface, after which it is soaked in hot water at a PHOTOGRAPHICPRINT AND METHOD OF MAKING THE SAME.

Application filed October 26, 1925. Serial No. 65,045.

temperature of to F. and until the paper willreadily peel off leavingthe sensi tized gelatin on the surface of the metal I plate. lhe'pictureis then developed by wasl'iing out a portion of the gelatin which hasnot been acted upon by the light, there by leaving upon the surface ofthe metal plate the picture in varying degrees of relief. The picture isthen fixed in a solution of alum, washed and dried in a well knownmanner, after which it is treated with a coat of transparent metallacquer to preserve it.

By scratching this surface as I have done,

a series of bright parallel lines or scratches are produced in thesurface of the metal which readily catch and reflect light so that thesharpness of the high lights is greatly magnified in contrast to thedarker portions of the picture through which relatively little of thisreflected light can pass. The result is that this method greatlyincreases the brilliance and pleasing appearance of any photographicprint made in this way.

It will be understood that while a transfer process is here described,it is illustrative only, and that other transfer processes may readilybe used or, if desired, a sensitized gelatin coating may be placeddirectly upon the surface of the metal plate prepared as has heretoforebeen described, and the exposure and developing may be made in any ofthe well known ways directly upon this coated plate, after which it maybe developed, washed and fixed in any well known manner.

Metals other than silver may be used for this-purpose. For example, theprepared surface of the plate may be gold plated and polished, and thepicture then deposited as has been described upon this gold platedsurface.

lVhile I have described but a few of the embodiments of my invention, itis to bi understood that it is capable of many modi fications. Changestherefore in the method and arrangement may be made without de partingfrom the spirit and scope of my invention as covered by the appendedclaims.

I claim:

1. The method of making photographic prints on metal consisting offorming-in the face of the metal a series of parallel scratches, andapplying thereon a continuous tone photographic print.

2. The method of making photographic prints on metal consisting offorming in which are in strong contrast to the high 15 the face of themetal a series of parallel scratches, and applying thereon a continuoustone photographic print, the deep shadows of Which are in strongcontrast to the highlights.

3. In a photographic print, a metal base having a series of parallelscratchesin its "face, and a continuous tone photographic print on saidsurface.

4. Ina ahoto 'ra hic rint a metal base l e P a having aseries ofparallelscratches in its face, and. a continuous tone photographic printon said surface, the deep shadows of 1 lights.

5. In a photographic print, a metal base having a series. of parallelscratches in its face, and a continuous tone carbon print on saidsurface. I

6. In a photographic print, a silver base having a series of parallelscratches in its face, and a continuous tone photographic print on saidsurface.

Intestimony whereof I have hereunto set my hand this 15th day ofOctober, 1925.

7 CHARLES IV. CARMAN.

